agreement no. ce 33/2011 (ce) planning and engineering
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Agreement No. CE 33/2011 (CE)
Planning and Engineering Study on Future Land Use at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island –
Feasibility Study
Revised Project Profile
219753-REP-011-02
Revised Draft | February 2014
This report takes into account the particular
instructions and requirements of our client.
It is not intended for and should not be relied
upon by any third party and no responsibility
is undertaken to any third party.
Job number 219753
Ove Arup & Partners Hong Kong Limited
Level 5 Festival Walk
80 Tat Chee Avenue
Kowloon Tong
Kowloon
Hong Kong
www.arup.com
Planning Department and Civil Engineering and Development
Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use
at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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Contents
Page
1 Project Background 1
1.1 Project Title 1
1.2 Purpose and Nature of Project 1
1.3 Name of Project Proponent 1
1.4 Location and Scale of Project and History of Site 2
1.5 Number and Types of Designated Projects to be Covered by the Project Profile 5
1.6 Name and Telephone Number of Contact Person 6
2 Outline of Planning and Implementation Programme 7
2.1 Project Implementation 7
2.2 Project Time-Table 7
2.3 Interactions with Other Projects 7
3 Possible Impacts on the Environment 9
3.1 General 9
3.2 Air Quality 9
3.3 Noise 9
3.4 Water Quality 9
3.5 Waste 10
3.6 Land Contamination 10
3.7 Ecology 11
3.8 Fisheries 12
3.9 Cultural Heritage 12
3.10 Landscape and Visual 12
4 Major Elements of the Surrounding Environment 14
4.1 Existing Environment 14
5 Environmental Protection Measures to be Incorporated in the Design and Any Further Environmental Implications 17
5.1 General 17
5.2 Air Quality 17
5.3 Noise 18
5.4 Water Quality 19
5.5 Waste 20
5.6 Land Contamination 22
5.7 Ecology 22
5.8 Fisheries 22
Planning Department and Civil Engineering and Development
Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use
at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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5.9 Cultural Heritage 23
5.10 Landscape and Visual 23
5.11 Severity, Distribution and Duration of Environmental Effects and Further Implications 25
6 Use Of Previously Approved EIA Reports 26
Figures
Figure 1.1 Study Area, Study Site and Proposed Works Area
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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1 Project Background
1.1 Project Title
1.1.1 Planning and Engineering Study on Future Land Use at Ex-Lamma
Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study (the
Project).
1.2 Purpose and Nature of Project
1.2.1 In 2002, the Planning and Development Study on Hong Kong Island
South and Lamma Island (HKIS & LI Study) was commissioned by
the Planning Department (PlanD) and the ex-Territory Development
Department (Civil Engineering and Development Department
(CEDD) today). The HKIS & LI Study remarked that given the
limited residential development opportunities in other parts of Lamma
Island, the residential development potential of the Ex-Lamma Quarry
Area at Sok Kwu Wan (Study Site) may be considered on its future
land use.
1.2.2 PlanD and CEDD of the Government then commissioned the Planning
and Engineering Study on Future Land Use at Ex-Lamma Quarry
Area at Sok Kwu Wan, Lamma Island – Feasibility Study in early
2012 to examine the future land use and explore the development
potential of the Study Site, as well as the impacts of the proposed
developments on the surrounding areas and adjacent water areas. The
findings and recommendations of the Project will serve as a reference
for the preparation and revision of the relevant town plans to guide the
future development of the Study Site, and provide the basis for further
engineering investigation and detailed design for the implementation
of necessary infrastructure works. An Environmental Impact
Assessment (EIA) which is the subject of the revised Project Profile is
within the scope of the Project.
1.2.3 The Project comprises tourist and recreational facilities accompanied
by housing developments in the Study Site. Supporting infrastructure
including refuse transfer facility, sewage treatment works, ferry and
refuse transfer piers, submarine sewage outfall, etc. will be provided
within the Study Site and the works areas identified in the Study Area.
1.2.4 In the course of the study, requirements for additional works areas to
accommodate these supporting infrastructures have been identified
beyond the original Study Area. The revised Study Area is shown in
Figure 1.1.
1.3 Name of Project Proponent
1.3.1 The Project Proponent is Hong Kong Island and Islands Development
Office (HKI&I DevO), Civil Engineering and Development
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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Department (CEDD) of the Government of the Hong Kong Special
Administrative Region (Government).
1.4 Location and Scale of Project and History of Site
1.4.1 The Study Site is located at the Ex-Lamma Quarry (ELQ) on the
northern coast of Sok Kwu Wan. It was established in 1978 for rock
extraction and miscellaneous processing and storage use. After years
of operation, it was left with steep rock faces that scarred the
landscape of the area.
1.4.2 In 1995, the Government endorsed the findings of Rehabilitation of
Lamma Quarry Planning and Engineering Study (the Rehabilitation
Study) conducted by Geotechnical Engineering Office (GEO) of the
Civil Engineering Department, i.e. adopting the recreational land use
as the preferred land use option and the Master Landscape Plan so
formulated for rehabilitation. Although the option for recreational land
use was adopted, it is identified in the Rehabilitation Study that the
adoption of the preferred option does not preclude future modification
for residential cum recreational uses, of which low density residential
development would be kept at the base of the northern slopes and on
the northern platforms.
1.4.3 The rehabilitation contract of the Rehabilitation Study for the Study
Site was completed in December 2002. The following works were
carried out under the contract:
a. Formation of a new landform comprising a broad, gently sloping
series of platforms bounded to the north with slopes which
merge with the natural hillsides.
b. Formation of a 5-hectare man-made lake with a natural, non-
engineered appearance and gently shelving edges which can
support reed bed.
c. Landscaping and planting of exotic and native trees to create a
self-sustaining, maintenance free, green environment with a
similar biodiversity to the surroundings.
1.4.4 In May 2011, the Study Site was put under Short Term Tenancy
(STT) to Young Men Christian Association (YMCA) for a non-profit
making environmental education and wild life learning centre for a
period of 3 years certain and thereafter quarterly. The 5-hectare man-
made lake remains in the middle of the Study Site. It connects with
some small ponds and discharges into the sea via a spillway at eastern
end of the Study Site. At the south western end of the Study Site,
there locates a mass concrete pier, which is some 500m to the
northwest of Sok Kwu Wan Pier No. 2. The existing geological
condition is mainly granite and reclamation.
1.4.5 Currently, the Study Site is covered by the approved Lamma Island
OZP No. S/I-LI/9 and is zoned “Undetermined” pending detailed
consideration of the appropriate uses. It covers an area of about 34.3
hectares with about 1 km of coastline.
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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1.4.6 In order to take into account the future developments in the
Comprehensive Development Area (CDA) site (southwest of the
Study Site) and to ensure the natural hazard and ecological values of
the adjacent slopes (north of the Study Site) are properly considered, a
larger area, the “Study Area” is included for the Study.
1.4.7 The Study Area, with a total area of 59.9 hectares, falls under the
approved Lamma Island Outline Zoning Plan No. S/I-LI/9. It contains
the Study Site (zoned “Undetermined”), the adjacent CDA site,
“Green Belt” and “Coastal Protection Area” zones. The Study Area is
bounded by slopes at the northeast and the coastline at the southeast.
1.4.8 Within the CDA site, an existing cement storage being managed by
Hong Kong Nihon Cement Company Limited is located. In addition,
a conveyor belt system connects the silos to a private pier to the south
of the CDA site.
1.4.9 The current proposed development will be located within this Study
Site. Additional works areas within the Study Area are required for
locating the supporting infrastructures.
1.4.10 In conjunction with the considerations of the public views and
comments collected during the Stage 1 Community Engagement, and
along with further findings and requirements upon studying the future
development in greater detail, the basis for the Preferred Option and
Preliminary Outline Development Plan was formed.
1.4.11 Revolving around a tourism and residential development theme, the
vision for the Preferred Option is to foster the tourism and recreational
opportunities while providing additional private and subsidised
housing to the area. Meanwhile, the provision of community facilities
and economic opportunities will also be sought to meet local
expectations and needs. A green and sustainable environment is
strived for, and the linkages within the ELQ development as well as to
the other parts of Lamma Island and Hong Kong Island would be
enhanced.
1.4.12 Through the addition of a wide range of tourist and recreational
facilities accompanied by housing developments, the plan will likely
comprise areas of housing development (for private housing and
subsidised housing), resort hotel development, commercial facilities,
recreational facilities (an Outdoor Recreation Centre and a Water
Sport Centre), G/IC facilities (include a refuse collection point (RCP),
refuse transfer facility (RTF), a fire station, library, police post, and
social welfare facilities), open space, green belt, roads and amenity
areas.
1.4.13 As there are currently no basic infrastructure and utility facilities
within the Study Site, supporting infrastructure requirements are being
devised and will potentially include the following provisions.
1.4.14 An electricity cable tunnel of over 2 km is proposed to be extended
from Yung Shue Wan. The future development will be served by a set
of 132kV power cables from the existing Lamma Power Station via
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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the existing Lamma – Ap Lei Chau 275 kV cable route, and the
construction of a new 132 kV electricity substation (ESS) in the Study
Site. The cables will be routed through the proposed cable tunnel from
Yung Shue Wan to the ESS.
1.4.15 The Project will propose to upgrade the existing trunk mains and
pumping station as well as provide new distribution mains to supply
fresh water from the existing Lamma Island Fresh Water Service
Reservoir to the Study Site.
1.4.16 No new gas main would be provided to the proposed development in
the near future, alternative options between the use of electricity as
energy supply or provision of LPG Cylinder Stores for the Study Site
are being considered.
1.4.17 Two drainage outfalls which will be located more than 300m away
from the nearest Sok Kwu Wan fish culture zone are proposed to serve
the future development. Alternatively, in order to maintain the water
level of the man-made lake for recreational use, it is considered to
convey all the surface runoff to the lake for replenishing the water
level of the man-made lake.
1.4.18 A refuse transfer facility (RTF) will be required within the future
development for the collection, compaction and transfer of household
waste arising from the Study Site and proposed developments.
1.4.19 A sewage treatment works (STW) with installed capacity to meet the
population requirements in the development will be required for the
collection, treatment and disposal of sewage arising. Effluent from
the STW will be discharged to deep sea through a submarine outfall
that will be extended underneath the hillslopes to the northeast of the
site. Dredging is required for the outfall diffusers, while Horizontal
Directional Drilling (HDD) will be applied for the construction of
submarine outfall. A sewage pumping station is also required.
1.4.20 A new ferry pier and refuse transfer facility (RTF) pier as well as two
landing steps are proposed to be extended from the existing seawall
for external transport provisions to the Study Site. Only piling works/
rock removal work will be required for RTF pier, new ferry pier and
landing steps.
1.4.21 A number of sites are proposed as open space to provide recreational
and leisure space serving future residents and general public. Lakeside
Park and Woodland Park are proposed linking to the man-made lake
and the mountain backdrop of the Study Site. A waterfront promenade
with pedestrian walkway and cycle track stretching from west to east
across the majority of the Study Site will serve as the primary green
spine. Open space will also be provided around the man-made lake to
promote public enjoyment.
1.4.22 The existing cement storage is a private site and zoned as CDA site.
According to the approved Lamma Island Outline Zoning Plan No.
S/I-LI/9, an environmental assessment is required by the future
developer prior to its development and therefore the assessment of
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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future land use of this CDA site is excluded from the Project. No
construction works is proposed within the CDA under this Project.
1.4.23 The project activities will occur only on the Study Site for
development and works area for infrastructure provisions. Other areas
of the Study Area will not have any construction activities.
1.5 Number and Types of Designated Projects to be Covered by the Project Profile
1.5.1 The Project involves a planning and engineering feasibility study
about 34.3 hectares of Study Site. Therefore it falls within Item 1 of
Schedule 3 of the Environmental Impact Assessment Ordinance
(EIAO), i.e. "Engineering feasibility study of urban development
projects with a study area covering more than 20 hectares or involving
a total population of more than 100 000.”. The Project is a
Designated Project requiring an EIA report.
1.5.2 The Project also consists of various Schedule 2 Designated Projects
under the EIAO that may be proposed in the course of the Project as
follows:
i. Possible construction of sewage treatment works [under Schedule
2, Part I, F.2(a)];
ii. Possible construction of sewage pumping station [under Schedule
2, Part I, F.3(b)];
iii. Possible construction of submarine sewage outfall [under
Schedule 2, Part I, F.6];
iv. Possible construction of refuse transfer station [under Schedule 2,
Part I, G.2].
1.5.3 Moreover, the two DPs identified in previous EIA Study Brief No.
ESB-232/2011 are no longer project elements constituting a DP. They
are:
i. A dredging operation which is less than 500m from the nearest
boundary of an existing fish culture zone [under Schedule 2, Part
I, C.12(a)] – The dredging operation will be more than 1km from
the nearest boundary of Sok Kwu Wan and Lo Tik Wan Fish
Culture Zones;
ii. A drainage channel or river training and diversion works which
discharges or discharge into an area which is less than 300m from
the nearest boundary of an existing fish culture zone [under
Schedule 2, Part I, I.13(b)] – The drainage discharge will be more
than 300m from the nearest boundary of Sok Kwu Wan Fish
Culture Zone.
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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1.6 Name and Telephone Number of Contact Person
1.6.1 All queries regarding the Project can be addressed to:
Mr. David K. C. LO (Chief Engineer/Islands)
Hong Kong Island and Islands Development Office, CEDD
13/F., North Point Government Offices
333 Java Road
North Point
Hong Kong
Tel. 2231 4443
Fax. 2577 5040
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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2 Outline of Planning and Implementation
Programme
2.1 Project Implementation
2.1.1 On completion of the P&E Study, it is proposed to implement the
Project by employing consultants to undertake the detailed design,
tender and supervision of construction phase of the Project in the later
stages.
2.1.2 The construction works of the proposed land formation and
infrastructure works to serve the Project will be carried out by
contractors to be appointed under various works contracts.
2.1.3 Land disposal will follow afterward for development.
2.2 Project Time-Table
2.2.1 The outline implementation programme of the development and
infrastructure will be determined in the P&E Study, while detailed
design of the development and infrastructure will be conducted in the
later stage.
2.3 Interactions with Other Projects
2.3.1 Potential projects that would have interface with the Project have been
identified and are listed below. This list will be revisited during the
EIA study to ensure all the latest projects identified with the
respective stakeholders are considered. Any cumulative impacts from
these concurrent projects during both construction and operational
phases of the Project will be identified and assessed accordingly.
Table 2.1 shows the preliminary list of concurrent projects.
Table 2.1 List of concurrent projects
Agreement
No.
Project
Proponent
Project Title
CE 43/2005
(EP)
DSD Harbour Area Treatment Scheme (HATS) Stage
2A
CE 63/2008
(CE)
CEDD Providing Sufficient Water Depth for Kwai
Tsing Container Basin and its Approach
Channel
N/A The Baroque
on Lamma
Limited
The Baroque on Lamma
N/A Hong Kong
Electric
Development of a 100MW Offshore Wind Farm
in Hong Kong
CE 20/2005
(DS)
DSD Outlying Islands sewerage stage 1 phase 1 part
2 and phase 2- Yung Shue Wan and Sok Kwu
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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Agreement
No.
Project
Proponent
Project Title
Wan sewerage, sewage treatment and disposal –
Design and Construction
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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3 Possible Impacts on the Environment
3.1 General
3.1.1 All the prevailing legislative requirements would be considered in the
EIA to assess the possible environmental impacts.
3.2 Air Quality
Construction Phase
3.2.1 During construction, dust is a potential air quality impact which would
be generated from construction activities such as material handling,
excavation, vehicle movement, erosion of unpaved area and stockpiles.
Operational Phase
3.2.2 During operation, the major sources of emissions would be village
vehicles within the development (if any), refuse transfer facility
services vehicles, marine vessels emission, and potential odour from
on-site sewage treatment works and pumping station, refuse transfer
facility and refuse collection point.
3.3 Noise
Construction Phase
3.3.1 During construction, the source of potential noise nuisance is
primarily from the use of powered mechanical equipment on site. The
construction activities will involve the use of plant for site formation,
excavation, slope works/ earth works, road works, utilities installation
and infrastructure etc.
Operational Phase
3.3.2 The future noise sources arising from the Project include road traffic
noise from village vehicles (if any), refuse transfer facility services
vehicles and other fixed noise sources such as potential electricity
substation, refuse transfer facility, sewage treatment work, sewage
pumping station and marine vessels.
3.4 Water Quality
Construction Phase
3.4.1 Potential water pollution sources during the construction phase
include site runoff during the following typical works activity:
Runoff and erosion from site surfaces, earth working areas and
stockpiles;
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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Wash water from dust suppression sprays and wheel washing
facilities; and
Fuel, oil, solvents and lubricants from maintenance of
construction machinery and equipment.
3.4.2 Sewage effluents will arise from the sanitary facilities provided for the
on-site construction workforce. Portable chemical toilets and sewage
holding tanks would be provided.
3.4.3 Sediment released due to the potential dredging works for the
construction of submarine diffuser; modification of existing seawall/
pier may affect the water sensitive receivers including the Sok Kwu
Wan and Lo Tik Wan Fish Culture Zones.
Operational Phase
3.4.4 The implications of nutrient loading from storm discharges, and
domestic loading on the sewage treatment works and the capacity of
the proposed submarine outfall will be considered. The capacity of
the sewerage network (including local sewers and pumping stations)
and the sewage treatment plant will be assessed.
3.5 Waste
Construction Phase
3.5.1 Solid wastes are mainly generated from a wide range of construction
activities such as site formation, construction of roads and drains, and
construction of the proposed development and infrastructure. The
wastes arising from construction will consist of excavated and
demolished C&D materials during earthworks, chemical waste, and
general refuse. The quantities of wastes to be generated during
construction largely depend on the programmes of various works
packages requiring off-site disposal.
Operational Phase
3.5.2 The operation of the proposed development and associated
infrastructure will generate municipal solid waste. The storage and
handling of this waste have the potential to cause adverse environment
impact.
3.6 Land Contamination
3.6.1 Given the previous land uses before 1990s were involved with the
quarry operation making use of casting basin and yard, cement silos
and rock crushing plant. There is potential for land contamination.
3.6.2 Contamination assessment would be conducted to assess the potential
contamination issues within the Proposed Works Area and the Study
Site where construction activities would take place.
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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3.7 Ecology
3.7.1 All habitats within the Study Site are man-made, except for an area of
hard rocky shore, and are common in Hong Kong, and are largely the
result of the rehabilitation contract for the ex-Lamma Quarry that
commenced in 1995 and was completed in 2002. Ten landscape
rehabilitation zones were created within the Master Landscape Plan to
address the planting required for the Slope Areas and the Platform
Areas. An additional “area’ was incorporated into the Master Layout
Plan for the creation of a specific wildlife habitat for falcon nesting.
3.7.2 There are two Sites of Special Scientific Interests (SSSIs) on Lamma
Island, including the South Lamma Island which was designated as a
SSSI in 1980 aiming to protect the habitat of unusual bird species like
White-bellied Sea Eagle Haliaeetus leucogaster and Bonelli’s Eagle
Hieraaetus fasciatus near Mount Stenhouse; and Sham Wan which
was designated as a SSSI in 1999 aiming to protect the breeding site
of Green Turtle Chelonia mydas.
3.7.3 Although these two SSSIs are at least 1km (the South Lamma SSSI)
and 2km (Sham Wan SSSI) from the Study Site, any off-site
disturbance impacts resulting from the Project to these SSSIs will be
fully investigated.
3.7.4 The potential terrestrial impact arising from the Project will be
associated with:
Construction Phase
(i) Direct loss of habitats due to construction activities, including
dredging, excavation works, access road, tree and slope cutting
and other associated works of the Project;
(ii) Potential destruction to habitats of ecological significance, e.g.,
woodland and falcon nests on cliff face;
(iii) changes in water qualities, hydrodynamics properties in natural
stream courses and associated riparian habitats, freshwater lakes
/ ponds and marine water bodies, hydrology; and
(iv) accidental discharge of untreated sewage.
Operational Phase
(i) Physical disturbance (mortality) of marine mammals by
increased marine traffic;
(ii) Impacts and physical disturbance due to increased levels and
change of pattern on marine traffic during construction and
operational phases;
(iii) Disturbance to wildlife due to increased human activities; and
(iv) Disturbance to wildlife and vegetation due to possible air
pollution, water pollution and noise.
Planning Department and Civil Engineering and
Development Department
Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-
Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile
219753 | Revised Draft | 25 February 2014
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3.8 Fisheries
3.8.1 There are two Fish Culture Zones (FCZs), namely Sok Kwu Wan FCZ
and Lo Tik Wan FCZ, identified in the vicinity of the Project.
Construction Phase
3.8.2 The potential impacts on fisheries activities and resources at the
sensitive receivers could be caused by dredging works for submarine
diffuser and modification of existing seawall/ pier in the form of direct
habitat loss or indirect disturbance impacts.
Operational Phase
3.8.3 The potential impacts on fisheries activities and resources at the
sensitive receivers could be caused by the possible increase in marine
traffic.
3.9 Cultural Heritage
Construction Phase
3.9.1 Cultural heritage sensitive receivers have been identified. Potential
impacts, both direct and indirect, and their physical extent, on heritage
resources arising from the proposed Project during the construction
phase would be identified. Direct impacts are direct loss, destruction
or disturbance in whole or in part of the cultural heritage permanently
or temporarily due to the proposed construction works and potential
damage to the physical fabric of archaeological remains, historic
buildings or historic landscapes through air pollution. Preservation in
totality would be taken as the first priority in the assessment of such
impacts.
Operational Phase
3.9.2 There are no historical buildings, temples, shrines nor Fung Shui
elements in the Study Area. Direct and indirect cultural heritage
impacts during the operational phase are not expected.
3.10 Landscape and Visual
3.10.1 The expected sources of landscape and visual impacts arising from the
Project would include, but not limited to, the following:
Construction Phase
(i) Loss of landscape elements, e.g. woodland, trees, small ponds
and natural topography;
(ii) Loss of visual amenity through removal of landscape elements
e.g. trees;
(iii) Visual appearance of any temporary use prior to the new
development;
(iv) Construction activities on the existing available land; and
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(v) Obstruction of or intrusion into views by the new development.
Operational Phase
(i) Visual intrusion and obstruction created by the new
development;
(ii) Visual quality of the new development;
(iii) Landscape impact arising from road works and related
infrastructure facilities; and
(iv) Permanent loss of landscape and visual amenity of natural
environment due to the new development.
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4 Major Elements of the Surrounding
Environment
4.1 Existing Environment
4.1.1 Currently, the Study Site is covered by extensive vegetation with
exotic and native plants scattered across the site, creating a self-
sustaining green environment. A broad and gently sloping series of
platforms bounded to the north with slope created under the
rehabilitation program is merged with the natural hillsides.
4.1.2 To the north of the Study Site is surrounded by an area with extensive
coverage of greenery which is currently zoned as “GB” on the Lamma
Island OZP No. S/I-LI/9. The Lamma Island Youth Hostel and a
memorial garden are located further north to the Site inside the “GB”
zone. The closest recognised village, Luk Chau Village, is located
approximately 100 metres from the northwest boundary of the Study
Area.
Air Quality
4.1.3 The surrounding area of the Project is mainly dominated by rural
villages with a cement storage area located at the southwest of the
Study Site. There are no roads within the Study Area but marine
emission from the ferry services is the primary source of air pollution.
In addition, the HEC Lamma Power Plant is located at some 1km
away.
Noise
4.1.4 The noise climate is rural in nature and dominated by village type
community noise, marine noise from vessels commuting in the
vicinity of the Study Site.
Water Quality
4.1.5 A 5 hectare man-made lake with a natural, non-engineered appearance
and gently shelving edge together with 4 associated ponds formed part
of the rehabilitation work within the Study Site. The overflow from
the lake is spilled over to the sea via a spillage located to the east of
the lake.
Waste
4.1.6 The existing solid wastes arising from within the Study Area including
the general refuse arising from staff at the cement storage area and
people visiting YMCA recreational facilities.
Land Contamination
4.1.7 The Study Site is used by YMCA for recreational purposes. No
special land use or activity was observed that may have the potential
for causing soil and groundwater contamination. However, as
revealed from the historical aerial photographs, part of the quarry site
was found to have rock crushing and screening plant, cement silos and
casting basing and yard with the potential of land contamination.
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Ecology
4.1.8 All habitats within the Study Site are man-made, except for an area of
hard rocky shore, and are common in Hong Kong, and are largely the
result of the rehabilitation contract for the ex-Lamma Quarry that
commenced in 1995 and was completed in 2002. Ten landscape
rehabilitation zones were created within the Master Landscape Plan to
address the planting required for the Slope Areas and the Platform
Areas. An additional “area’ was incorporated into the Master Layout
Plan for the creation of a specific wildlife habitat for falcon nesting.
Fisheries
4.1.9 Sok Kwu Wan and Lo Tik Wan are the two gazetted Fish Culture
Zones (FCZs) close to the ELQ site. The two FCZs also support
recreational fishing activities.
Landscape and Visual
4.1.10 The rehabilitation plan has produced a largely green hillside that
surrounds much of the Study Site at its borders. On the flatter ground,
while there are some tree patches, the landscape is mainly grassland/
scrubland and a large lake is a notable feature in the centre of this.
Cultural Heritage
4.1.11 There are two Sites of Archaeological Interest which have been
recorded within the 300m of the Study Area which includes Lo So
Shing (蘆鬚城) and Sha Long Wan (Tit Sha Long) (砂塱灣(鐵砂塱)).
Beyond the Study Area (within 1km) there are two Sites of
Archaeological Interest: Lo Ah Tsai Stone Circle (老鴉仔石圓環) and
the Mo Tat Wan (模達灣).
Sensitive Receivers
4.1.12 The existing environment of the site and its surroundings has been
reviewed above. The key existing sensitive receivers are listed in
Table 4.1. The list will be expanded to include other sensitive
receivers to be identified during the EIA study.
Table 4.1 Sensitive receivers of the Project
Item Description
Air Sensitive Receivers (ASRs) Luk Chau Village
Lo So Shing
Lamma Island Youth Hostel
Sok Kwu Wan
Noise Sensitive Receivers (NSRs)
Luk Chau Village
Lo So Shing
Lamma Island Youth Hostel
Sok Kwu Wan
Water Sensitive Receivers Fish Culture Zone
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Item Description
(WSRs) Lake and pond
Conservation area
Coastal Protection Area
Coral at Luk Chau
Ap Lei Chau WSD Seawater Intake
Wah Fu Estate Seawater Intake
Coral at Pak Kok
Ecology Sensitive Receivers Romer’s Tree Frogs
Black Kite
Protected tree species such as Aquliaria sinensis
Fisheries Sok Kwu Wan Fish Culture Zone
Lo Tik Wan Fish Culture Zone
Cultural Heritage Lo So Shing Site of Archaeological
Interest
Sha Long Wan Site of Archaeological Interest
Lo Ah Tsai Stone Circle
Mo Ta Wan Site
Pak Kok Tsui
Landscape Character Area (LCAs)
Former Sok Kwu Wan Quarry Coastal Landscape
North Lamma Coastal Uplands Landscape
Sok Kwu Wan Coastal Bay Landscape
Visual Sensitive Receivers (VSRs)
Lo So Shing
Ta Shui Wan
Sok Kwu Wan
4.1.13 The cement storage area is zoned as CDA site according to the
Lamma Island OZP No. S/I-LI/9. However, at the time of preparing
this Revised Project Profile, no planning application on the
development of this CDA has been submitted. Hence, the future
environment of the Study Site would regard the cement storage area to
remain unless there is planning application approved during the EIA
Study.
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5 Environmental Protection Measures to be
Incorporated in the Design and Any
Further Environmental Implications
5.1 General
5.1.1 The EIA study will assess potential environmental impacts (both
cumulative impacts and those arising from the Project) and propose
appropriate mitigation measures with the intention that all works
recommended by the Project would be environmentally acceptable
and cost effective. Reference would be made to the relevant
legislation and other requirements including but not limited to the
EIAO and HKPSG etc. The residual impacts, if any, would be
confined to within allowable limits. Environmental monitoring and
auditing of potential impacts that may arise from the implementation
of the works will be provided for the construction and operational
phases. Subject to the findings of the EIA study, the following
mitigation measures would be incorporated in the design, construction
and operation of the Project.
5.2 Air Quality
Construction Phase
5.2.1 In order to prevent adverse impacts on air quality, the control
measures stipulated in the Air Pollution Control (Construction Dust)
Regulations would be implemented wherever applicable to limit the
dust emissions from the site. Subject to investigation, the following
mitigation measures will be considered during the construction period
to minimize impacts on air quality on nearby ASRs.
(i) Stockpiles of dusty material will not extend beyond site
boundaries;
(ii) In the process of material handling, any material which has the
potential to create dust will be treated with water or sprayed
with a wetting agent where practicable;
(iii) Stockpiles of sand and aggregate will be enclosed on three sides
and water sprays will be used to dampen stored materials and
when receiving raw material;
(iv) The site will be frequently cleaned and watered to minimise
fugitive dust emissions; and
(v) Motorised vehicles on the site will be restricted to a maximum
speed of 15 km/hr and shall be confined to designated haul
routes which will be paved or surfaced with hardcore.
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Operational Phase
5.2.2 Subject to investigation, the proposed mitigation measures to improve
the air quality within the possible developments and infrastructure are
to be considered as follows:
Adequate buffer distance is recommended to separate the ASRs
and emission sources.
Odour control from possible sewage treatment works, sewage
pumping stations, refuse collection point and refuse transfer
facility for the developments will include:-
a. design to be in accordance with DSD's Standard Design
on Sewage Pumping Station, with all pumps located
underground and enclosed within a structure/building;
b. covering the effluent channels of preliminary treatment
facilities and sludge treatment facilities;
c. deodorization system to be installed with good
housekeeping practice adopted; and
d. identification of appropriate mitigation measures for
prevention of septicity of sewage due to the operation of
any proposed sewage pumping station and the associated
rising mains which might cause odour nuisance to the
public.
5.3 Noise
Construction Noise
5.3.1 Subject to investigation, the following measures will be considered
during construction period to minimize construction noise impacts on
nearby NSRs.
Plant operated on site should be well maintained and serviced
regularly.
Subject to such working constraints as power supply, safety and
obstruction of proposed works, mobile plant will be sited as far
away from the nearby NSRs as practicable.
Noise activities will be planned and scheduled to be undertaken
during appropriate time periods to minimise potential noise
impacts at nearby NSRs. Noisy construction activities will be
scheduled to take place at noise-tolerant time periods (e.g. lunch
time).
Materials stockpiles and other massive structures (such as
temporary site offices) will be effectively utilised, where
possible, to screen noise from construction activities.
Noisy plant or processes will be replaced by quieter alternatives
where possible. Silencers or mufflers on construction
equipment should be utilised and be properly maintained during
the construction works.
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Where necessary, temporary and movable noise barriers and
enclosures will be employed to minimise noise impact to NSRs.
Operational Phase
5.3.2 For the potential impacts arising from the refuse transfer facility
services vehicles, fixed noise and marine vessels noise, the following
mitigation measures would be considered.
Proper arrangement of landuses and the use of special building
design.
Provisions for careful siting of noisy machinery within the site;
by enclosing the noisy machinery within building structures; by
use of acoustic louver or silencer for ventilating fan, acoustic
door and absorptive wall lining will be considered.
5.4 Water Quality
Construction Phase
5.4.1 In order to prevent adverse water quality impacts, the following
general mitigation measures would be put in place.
Surface run-off from the construction sites will be directed into
storm drains via adequately designed wastewater treatment
facilities such as sand traps, silt traps and sediment basins.
Channels, earth bunds or sand bag barriers will be provided on
site to properly direct stormwater to such facilities;
Silt removal facilities, channels and manholes will be
maintained and the deposited silt and grit will be removed
regularly, at the onset of and after each rainstorm to ensure that
these facilities are functioning properly at all times.
Open stockpiles of materials on site will be avoided or where
unavoidable covered with tarpaulin or similar fabric during
rainstorms. Measures will be taken to prevent the washing away
of construction materials, soil, silt or debris into any drainage
system.
Manholes (including any newly constructed ones) will always
be adequately covered and temporarily sealed so as to prevent
silt, construction materials or debris from getting into the
drainage system.
Where possible, works entailing soil excavation will be
minimised during the rainy season (April to September).
Final earthworks surfaces will be well compacted and
hydroseeding following completion to prevent erosion.
All vehicles and plant will be cleaned before they leave the
construction site to ensure that no earth, sediments or debris is
deposited by them on roads.
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During construction works, proper toilets will be provided for
the use of site staff. A licensed contractor will be responsible
for appropriate disposal and maintenance of the effluent.
All fuel tanks and chemical storage will be sited on sealed areas
and provided with locks. The storage areas shall be surrounded
by bunds with a capacity equal to 110% of the storage capacity
of the largest tank to prevent spilled oil, fuel and chemicals from
reaching the receiving waters. Drainage from oil filing points
and any areas where fuels and lubricants are used will be
connected to storm drains via a petrol interceptor.
Dredging works will be avoided or minimized. Should dredging
works be required, assessment of the sediments in compliance
with the Dumping at Sea Ordinance will be needed.
Operational Phase
5.4.2 The following general mitigation measures would be considered
during further assessment of potential water quality impact:
Provision of sand/silt and oil/grease traps at suitable locations to
prevent ingress of pollutants to the stormwater system;
Construction of drainage works to prevent increased risk of
flooding;
Construction of sewerage system to ensure proper discharge of
sewage effluent flows from the developments; and
Provision of suitable measures to minimise the risk of
emergency discharges of untreated sewage effluent and to
ensure timely repair.
5.5 Waste
Construction Phase
5.5.1 The construction work including site formation, construction of roads
and drainage, construction of developments and associated
infrastructures will generate C&D materials. Other than C&D
materials, solid waste such as C&D waste, chemical waste, general
refuse etc. would also be generated.
5.5.2 As the developments and infrastructure may require the import of fill
material, the inert C&D materials would be considered for reuse. The
following measures would be considered to reduce the quantities of
C&D materials for disposal off site:
Use waste haulier authorised or licensed to collect specific
category of waste;
Waste haulier should obtain the necessary registration and
licences under the Waste Disposal Ordinance and the Waste
Disposal (Chemical Waste) (General) Regulation from the
Environmental Protection Department;
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Nomination of an approved person, such as site manager, to be
responsible for good site practice, arrangements for collection
and effective disposal to an appropriate facility, of all waste
generated at the site;
Separation of chemical wastes for special handling and
appropriate treatment at a licensed facility;
A recording system for the amount of wastes generated,
recycled and disposed of (including the disposal sites);
In order to monitor the disposal of C&D material and solid
wastes at public filling facilities and landfills, and control fly-
tipping, a trip-ticket system shall be implemented by the
Contractor, in accordance with the contract and the requirements
of ETWB TC(W) No. 31/2004 "Trip Ticket System for Disposal
of Construction and Demolition Material";
A Waste Management Plan (WMP) shall be prepared and this
WMP shall be submitted to the Engineer for approval. The
WMP will be in accordance with ETWB TC(W) No. 19/2005
"Environmental Management on Construction Sites";
Segregation and storage of different types of waste in different
containers, skips or stockpiles to enhance reuse of recycling of
materials and their proper disposal;
Any unused chemicals or those with remaining functional
capacity shall be recycled;
Use of reusable non-timber formwork to reduce the amount of
C&D material; and
Proper storage and site practices to minimise the potential for
damage or contamination of construction materials.
Operational Phase
5.5.3 The following mitigation measures are to be considered:
The containment, storage and delivery of the sewage sludge
should be enclosed.
Odour removal facilities should also be installed to minimise the
potential air quality impacts to any sensitive receivers.
General refuse should be collected from lidded bins and
delivered to a central collection point and should be stored in
enclosed containers to prevent odour, windblown litter, vermin,
water pollution and visual impact.
Removal of recyclables should be encouraged or formal systems
organised, and may occur before or after the delivery of wastes
to the central collection point. Collection bins for used
aluminium cans, waste paper and glass bottles are recommended
to be provided at strategic locations of the development site to
encourage recycling by residents.
Provision of recycling area in the refuse transfer facility.
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5.6 Land Contamination
5.6.1 Subject to EIA findings, the following mitigation measures will be
considered during the construction phase to minimise any potential
exposure to contaminated soils or groundwater:
Site workers should wear gloves, masks and other protective
clothing where exposure to vapour or contaminated soil may be
encountered.
Contaminated materials should be removed with bulk earth
movers to prevent human contact.
Adequate washing facilities should be provided and
smoking/eating should be prohibited in the area.
Any contaminated sediments that may need stockpiling or need
to be transported should be covered with tarpaulin.
Leakage of pollutants or leaching from excavated soil should be
prevented by storing on an impermeable surface.
Only licensed waste hauliers should be used to collect and
transport any contaminated material to an appropriate disposal
site and procedures should be developed to ensure that illegal
disposal of wastes does not occur.
In view of the safety concerns about human contact with the
contaminated soil, the contaminated soil should be treated
properly and remediation action should be proposed, if required.
The necessary waste disposal permits should be obtained, as
required, from the appropriate authorities, in accordance with
the Waste Disposal Ordinance (Cap 354), Waste Disposal
(Chemical Waste) (General) Regulation (Cap 354).
5.7 Ecology
5.7.1 The mitigation measures that would be implemented to minimize air
quality, noise and water quality impact could also help to reduce
potential impact to ecological resources.
5.7.2 As regards ecological impact, the principal of avoidance would be
used wherever possible. For impact which is considered unavoidable,
further mitigation measures would be considered, including
translocation of important species, confining construction works to a
specific area/season, alternative design/construction methods, good
site practices etc.. Compensation would be considered for the loss of
important species or habitats, if any.
5.8 Fisheries
Construction Phase
5.8.1 In respect of identified fish culture zones, mitigation measures to
minimise potential impact during the construction phase would be
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considered temporary given the transient nature of marine fish and the
high flexibility of capture fisheries operation (in which small vessels
such as sampans are commonly used in the area) the impacts are
considered minor.
Operational Phase
5.8.2 The proposed Project should be designed to avoid possible
disturbance from increased marine traffic during operation through
careful design of the ferry routes which will generally follow the
existing routes without adding new routes close to Sok Kwu Wan FCZ.
The routes and frequency of transportation of refuse by sea should
also be carefully designed to avoid disturbance to existing Sok Kwu
Wan FCZ.
5.9 Cultural Heritage
5.9.1 Impacts to cultural heritage sites would be avoided as far as
practicable. If unavoidable, mitigation measures for built heritage and
archaeological resources would be implemented.
5.9.2 Cultural Heritage Impact Assessment (CHIA) comprising a Built
Heritage Impact Assessment (BHIA) would be considered to conduct.
The BHIA needs to compile an inventory of historic buildings and
clan graves in the vicinity of the Project site. If unavoidable,
appropriate mitigation measures would be designed and implemented.
5.10 Landscape and Visual
5.10.1 During the design stage, the following measures are to be considered
to minimize the landscape and visual impacts, including, but not
limited to:
the urban design principles such as the density of the
development and focusing the development around certain
functions;
controlling building height profiles and providing stepped
building heights;
responsive building massing;
preserving and establishing visual and open space links,
including provision of view and breeze corridors; and
landscape design principles such as avoid or minimize
disturbance to significant landscape resources.
5.10.2 During the construction phase, the following general mitigation
measures will be considered to alleviate the impacts, including, but
not limited to:
erosion control measures should be implemented for protection
of construction works and the landscape if heavy rains occur;
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to maintain the appearance of a tidy site, construction plant (not
in use) and materials should be stored neatly and covered where
appropriate. Construction debris should be tidied regularly and
good site waste management practices followed. Solid hoarding
should be used to screen views into the construction site from
visually sensitive receivers; and
tree transplanting and compensatory planting will be considered
to mitigate the impact on the existing tree/woodland.
5.10.3 During the operational stage, the following general mitigation
measures are to be considered, including, but not limited to:
roadside planting is proposed alongside all roads within the
developments. It will enhance local identity, if theme planting is
used, and reduce visual impact through screening;
amenity strips will be provided to local roads, wherever
practicable, to mitigate their visual appearance;
seaside promenade will be designed to improve the visual
appearance of the road corridor;
the visual impact of any noise mitigation measures will be
mitigated by appropriate detailed design, including use of
transparent panels, provision of at-grade planting of trees,
shrubs and/or climbers camouflage to the barriers, appropriate
colour selection of panels and supporting structure as well as
design of supporting structures to incorporate a high level of
quality and aesthetics. Sufficient space shall be allocated for
greening provision in planning and designing of noise barriers.
Relevant technical documents WBTC No. 25192 - Allocation of
Space for Urban Street Trees, WBTC No. 7/2002 - Tree
Planting in Public Works, and Guidelines on Design of Noise
Barriers by HyD and EPD in 2003 shall be observed;
the landscape treatment of soil slopes will be provided to
enhance their visual appearance. Relevant technical document
GEO Publication No. 1/2011 Technical Guidelines on
Landscape Treatment for Slopes by CEDD in 2011 shall be
observed;
landscape treatment will be provided to any sewage pumping
stations, refuse collection points, where practicable, to enhance
their visual appearance. Relevant technical document Technical
Circular (Works) No. 3/2012 Site Coverage of Greenery for
Government Building Projects by Development Bureau in 2011
shall be observed;
the provision of the identified urban design measures as
identified in the design stage.
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5.11 Severity, Distribution and Duration of Environmental Effects and Further Implications
5.11.1 Subject to the findings of the assessments, effective control and
mitigation measures would be identified to ensure potential impacts
are reduced to an acceptable level. The potential severity, distribution
and duration of environmental effects such as beneficial and adverse
effects, short and long term effects, secondary and induced effects,
cumulative effects and transboundary effects would be considered and
addressed in the EIA, where applicable. Feedback from public
consultation conducted by the Project Proponent would also be
documented in the EIA.
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6 Use Of Previously Approved EIA Reports
6.1.1 There is no EIA report already approved under the EIA Ordinance for
this Project. However, the following report as shown in Table 6.1 is
relevant and would be referred to in the EIA study. Where necessary,
other relevant information identified during the Study would also be
considered and documented in the EIA.
Table 6.1 Previously approved EIA report
EIAO Register No.
Title Date of Approval
Relevance to this Project
EIA-022/BC Lamma Quarry: Casting Basin & Moderate Quarry Extension, Environmental Impact Assessment
1993 The baseline information would be considered as appropriate.
Figures
top related